The BPI bit (also referred to as BPI-bit, stylised as bpi:bit) is an ESP32 with 32-bit Xtensa LX6 dual-core processor based embedded system. It supports Webduino, Arduino, MicroPython as well as Scratch X programming environments.

Hardware

Hardware description

Webduino Bit is the latest board of Webduino with much more sensors on top of its basic functions(Wi-Fi connection, muti-connectivity,multi-board...). It uses ESP32 module,one of the most efficient and stable chipset in the market, which has built-in 2.4G Wi-Fi and Bluetooth,448KB ROM,520KB SRAM,speed up to 600 DMIPS,and 40 nm technology.

Webduion bit board has a compact size of 50mm x 50mm, weighs 10-12 grams.It has 20 pins at the bottom,25 full color LED array in the middle, two photo cells,two buttons, one thermistor,one buzzer,one 9-axis sensor(3-axis accelerometer,3-axis gyroscope and 3-axis magnetometer), the pin layout are below:

Hardware interface

PIN definitions

The edge interface is much compatible with those of micro:bit. so you may able to use micro:bit accessories on bpi:bit

HardWare PIN define of BPI:bit

Pin Name

Analog Function1

Analog Function2

Function1

Function2

Power

P3

ADC2_CH4

GPIO13

P0

ADC2_CH8

DAC_1

GPIO25

P4

ADC2_CH3

GPIO16

P5

ADC1_CH7

GPIO35

P6

ADC2_CH5

GPIO12

P7

ADC2_CH6

GPIO14

P1

ADC1_CH4

GPIO32

P8

GPIO16

P9

GPIO17

P10

ADC2_CH9

DAC_2

GPIO26

P11

ADC2_CH7

GPIO27

P12

ADC2_CH2

GPIO02

P2

ADC1_CH5

GPIO33

P13

GPIO18

SPI_SS

P14

GPIO19

SPI_SCK

P15

GPIO23

SPI_MISO

P16

GPIO05

SPI_MOSI

3V3

POWER:3V3

3V3

POWER:3V3

3V3

POWER:3V3

P19

GPIO22

I2C_SCL

P20

GPIO21

I2C_SDA

GND

GROUND

GND

GROUND

GND

GROUND

5*5 25 LED

BPI:bit have 25 LEDs on board, it can be controlled with a single GPIO.

25 5*5 LED list of BPI:bit

20

15

10

5

0

21

16

11

6

1

22

17

12

7

2

23

18

13

8

3

24

19

14

9

4

MPU9250 9-axis sensor

The 9-axis sensor, MPU9250, is placed on the BPI:bit board. and MPU9250 uses I2C 0x69 address.

The 9-axis is the combination of 3 separate triple axis sensors. For more detailed information of this chip, click here MPU 9250 datasheet to view the datasheet.\

BPI:bit power

When you use BPI:bit, you need to supply the board first, and the bit supports three power supply modes

1.micro USB port:USB cable power supply, the design of BPI:bit board has Micro USB interface, which is quite common in daily life and is quite convenient to use.

2.Battery port:Through 2 pin battery power supply socket, can through the lithium battery, battery pack to power supply board, interface fool proof design, don't worry about the power supply through the 2 pin battery power supply socket, can through the lithium battery, battery pack to power supply board, interface fool proof design, don't have to worry about power supply meet the problem.

3.Goldfinger ：Power is supplied through the gold finger, and the gold finger at the bottom of the board contains the power interface. Meanwhile, it has both input and output functions and has high compatibility.

BPI:bit VS micro:bit

bpi:bit VS micro:bit

Module

bpi:bit

micro:bit

CPU

Dual-core 32bit Xtensa LX6, up to 240MHz

NXP KL26Z 32bit ARM Cortex M0, up to 16MHz

RAM

520 KB

16 KB

ROM

448 KB

Unkown

Flash

4096 KB

256 KB

Bluetooth

BT4.2 BR/EDR and BLE

BLE only

WIFI

802.11 b/g/n/e/i

N/A

Buzzer

1x Buzzer

N/A

5*5 LEDS

25 intelligent-control full-color (16777216 color) LEDs, Cascading all LEDs by a single line.